macrumors Core

I've replaced two DC In boards. Both had different characteristics. The first one acted like yours, except that it didn't shut down on me. It just would not charge, but was able to run on battery.

My second one would charge but showed no charge icon.

In your case, my speculation would be that the circuitry detects that a charger has been plugged in so switches to charge instead of running from batter, but because the board has failed the Mac finds itself with no power source and shuts down. If you pull the power cord out before the Mac turns off on you does it go back to running from battery? Just my speculation, I'm not an expert by any means.

I would replace it though.. They aren't that expensive and it isn't major surgery.

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